11.4 Assembling the complete circuit
The final step is to connect the output of the input stage (the base emitter junction of Q1) to the input of the output stage (the base emitter junction of Q2) to build the basic BJT current mirror circuit (figure 11.4). At this point we will concentrate on the issues involved with the BJT current mirror and pick back up with the MOS current mirror in section 11.6.